Finding the Third Proportional to 249,120 and 386,804.25

Step by Step Solution

1. Step 1: Write the proportion equation
   249,120 : 386,804.25 = 386,804.25 : x
2. Step 2: Convert to fraction form
   249,120/386,804.25 = 386,804.25/x
3. Step 3: Cross multiply
   249,120x = 386,804.25 × 386,804.25
4. Step 4: Simplify right side
   249,120x = 149,617,527,818.06
5. Step 5: Solve for x
   x = 149,617,527,818.06/249,120
6. Step 6: Final answer
   x = 600,584.17